After my (slight) dissapointment today looking at alternative speakers to current FS1's, I thought I would speak to Mission to see if they could solve my sub thumping probs... The guy I spoke to thought it must be some earthing problem between the amp and the sub... After some more experimentation, this is what happens... If I turn off the active sub, but leave all cables attached between amp and sub, the sub (of course) does not make any noise, but I hear a click from the sats when I change sources or stop/start a DVD - in fact if anything happens that causes some kind of switch in the amp. If I then unplug the sub RCA cable from either end (amp or sub), the clicks go away (but leave the rest of the speakers still attached). If the sub is switched on then the sub thumps very loudly and sats just click... So whatever is causing this problem is transmitted down/received by the amp to sub RCA connection. I tried to gnd the amp and sub together - not easy as the sub is mainly plastic, but did not get any joy - not sure if i managed a gnd so this may still be the option. I know the FS1's are good, tried them with a different amp today, no probs, they just dont like my new amp! Any input would be much appreciated! Otherwise its another call to Mission on Monday. Steve.